Saving a File to an Output Stream Leave feedback

To save the conversion results directly to an OutputStream, follow these steps:

1. Define a Method to Obtain the Output Stream: Create a method that returns an OutputStream. This stream will be the destination for the converted file.

2. Pass the Output Stream to the convert() Method: Use the output stream as a parameter in the convert() method to direct the converted file to the stream instead of saving it directly to a file.

Note

This approach is particularly useful when:

• You want to process the converted file in memory without writing it to disk immediately.
• You need to send the file over a network, such as through an HTTP response.
• You are integrating with external systems or APIs that require stream-based file handling.

import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.util.function.Supplier;
import com.groupdocs.conversion.Converter;
import com.groupdocs.conversion.options.convert.PdfConvertOptions;

public class ConvertDocxToPdf {
    public static void convert() {
        // Create a supplier that provides the output stream for the converted file
        Supplier<OutputStream> getOutputStream = () -> getFileStream("c:\\files\\business-plan.pdf");

        // Initialize the converter with the source document
        Converter converter = new Converter("c:\\files\\business-plan.docx");

        // Define conversion options (converting to PDF)
        PdfConvertOptions options = new PdfConvertOptions();

        // Pass the output stream to the convert method
        converter.convert(getOutputStream.get(), options);
    }

    // Method to obtain the output stream for the conversion result
    public static OutputStream getFileStream(String outFile) {
        try {
            return new FileOutputStream(new File(outFile));
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    public static void main(String[] args){
        convert();
    }
}

• Creating the Output Stream Supplier: The Supplier<OutputStream> is a functional interface that lazily provides the output stream. This allows flexibility if you need to configure the stream dynamically.
• Initializing the Converter: The Converter object is initialized with the source file (business-plan.docx).
• Setting Conversion Options: The PdfConvertOptions object defines specific options for converting to PDF. You can customize this according to your needs, such as setting the page orientation, margins, or compression.
• Converting and Writing to the Stream: The convert() method takes the output stream provided by getOutputStream.get() and writes the converted content directly to it. In this case, the PDF file will be saved to c:\\files\\business-plan.pdf.
• Error Handling: The getFileStream() method includes basic error handling. If an exception occurs while creating the file stream (e.g., due to incorrect file paths or permission issues), the stack trace will be printed, and null will be returned.